dlat2s.f (3) Linux Manual Page

dlat2s.f –

Synopsis

Functions/Subroutines

subroutine dlat2s (UPLO, N, A, LDA, SA, LDSA, INFO)
DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.

Function/Subroutine Documentation

subroutine dlat2s (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, real, dimension( ldsa, * )SA, integerLDSA, integerINFO)

DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.

Purpose:

 DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE

 PRECISION triangular matrix, A.

 RMAX is the overflow for the SINGLE PRECISION arithmetic

 DLAS2S checks that all the entries of A are between -RMAX and

 RMAX. If not the convertion is aborted and a flag is raised.

 This is an auxiliary routine so there is no argument checking.

 

Parameters:

UPLO

 UPLO is CHARACTER*1

 = ‘U’: A is upper triangular;

 = ‘L’: A is lower triangular.

N

 N is INTEGER

 The number of rows and columns of the matrix A. N >= 0.

A

 A is DOUBLE PRECISION array, dimension (LDA,N)

 On entry, the N-by-N triangular coefficient matrix A.

LDA

 LDA is INTEGER

 The leading dimension of the array A. LDA >= max(1,N).

SA

 SA is REAL array, dimension (LDSA,N)

 Only the UPLO part of SA is referenced. On exit, if INFO=0,

 the N-by-N coefficient matrix SA; if INFO>0, the content of

 the UPLO part of SA is unspecified.

LDSA

 LDSA is INTEGER

 The leading dimension of the array SA. LDSA >= max(1,M).

INFO

 INFO is INTEGER

 = 0: successful exit.

 = 1: an entry of the matrix A is greater than the SINGLE

 PRECISION overflow threshold, in this case, the content

 of the UPLO part of SA in exit is unspecified.

 

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 112 of file dlat2s.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.